Water-paint and method of producing same.



Patented July 7, 1903.

PATENT 01mins.

SAMUEL s. RUSTON Ann BENJAMIN RUSTON, or SYRACUSE, NEW YORK.

WATER-PAINT AND METHOD OF PRODUCING SAME.

SPECIFICATION forming part of Letters Patent N 0. 732,896, dated July 7, 1903.

Application filed August 2. 1902. $erial No. 118,088. (No specimens.)

.To all whom it may concern:

Be it known that we, SAMUEL S. RUsTo'N and BENJAMIN RUSTON, both of Syracuse, in the county of Onondaga, in the State of NewYork, have invented new and useful Improvements in Water-Paints and Methods of Producing Them, of which the following is a full, clear, and exact description. i

This invention relates to water-paints and method of producing them.

Our object is to produce a water-paint by a combination of ingredients which shall render it cheap and durable and of great utility.

Our invention consists in a waterproof paint composed of the several ingredients, hereinafter specified, thoroughly mixed and commingled together bya process and method hereinafter set forth and to that end our invention consists in combining the several ingredients hereinafter specified and in the several new and novel steps constituting the process by which such waterproof paint is prepared, all of which are thoroughly set forth in the claims hereunto annexed.

We have discovered that by combining common cheese-curd, either wet or dry, with oil or fat in its finely-divided state such composition when mixed with an alkali solvent and .then again mixed with Water produces a tough waterproof film. We mix this composition with lime slaked with a solution of zinc sulfate and have as a result a composition which when mixed with water forms on drying a waterproof paint or adhesive mixture which is adapted for sizing, wall-coating, &c.

The following are substantially the proportions used to produce our composition, although we do not limit ourselves to these exactamounts, as they may be varied according to the use to which the composition is to be put, Ordinarily, however, we combine fifty per cent. of casein with an equal amount of hydrocarbon substances, such as oil or fat. The solution used to slake the lime with zinc sulfate comprises about ninety per cent. of

I lime and ten per cent. of zinc sulfate with the usual amount of water-that is, sufficient water to completely hydrate the CaO. These freshly-precipitated bodies render the hydro-- carbon substances present with casein quite insoluble when dried.

'ent, is-

The following is the formula of the reaction of the zinc sulfate and lime composition:

but under no circumstances must sufficient zinc sulfate be used to convert all the calcium hydroxid unto sulfate.

In carrying out this process we make the following steps: lVe first prepare an emulsion of oil or fat or saponify the same with an alkali, such as carbonate of soda or caustic soda, employing from fifteen to twenty-five per cent. of such alkali to the amount of oil or fat. We then add this to skimmed milk and heat to from 110 to 130 Fahrenheit and then add an acid, such as sulfuric acid. The acid neutralizes the alkali and deposits the oil or fat or their acids in a minutely-subdivided state, after which the curd and whey are separated, and after drawing oif the latter the mass of composition is then washed and dried. The curd compound thus obtained is further compounded with a solvent, such as an alkali or alkaline earths, which are dried or mixed with a suitable salt, the salt forming fate; We therefore combine burnt lime (or zinc) with zinc sulfate, and to accomplish this We first slake the lime by adding a solution of zinc sulfate thereto. The chemical action takes place when these ingredients are thus brought together, and the lime compound is thus made a fixing agent for the oily or fatty salts in combination with the curd, the two mixtures in the final product being in about equal proportions. This composition may also-be mixed with mineral matter, metallic oxid, coloring, &c., as desired. Theseingredients are then dried, finely ground, and when mixed with water produce a superior adhesive size or wall coating or paint.

Having thus described our invention, what we claim, and desire to secure by Letters Pat- 1. The herein-described composition consisting of milk albuminoids, oily substances, lime and zinc hydroxid and calcium sulfate.

2. The herein-described composition consisting of milk albuminoids, oily or fatty sub.-

stances, lime zinc hydroxid and calcium sulfate and a filler of mineral matter in a finelydivided state.

3. The herein-described process of producing paints comprising the following steps: firstemu1sifying theoilyor fatty substances, mixing it with skimmed milk, adding an acid to precipitate the milk and resin, separating it from the whey, then washing the curd oompound,then drying and pulverizing, then mixing with the lime compound obtained by slaking the lime with a solution of zinc sulfate.

4:. The herein-described process of producing paints comprising the following steps:

i 5 firSt-emul sifying the oily or fatty substances,

mixing it With skimmed milk, adding an acid to precipitate the milk and resin, separating it from the Whey, then washing the curd compound,then drying and pulverizing, then mixing with the lime compound obtained by slaking the lime with a solution of zinc sulfate and mineral matter in its finely-divided state.

In witness whereof we have hereunto set our hands this 29th day of July, 1902.

SAMUEL S. RUSTON. BENJAMIN RUSTON.

Witnesses:

MILDRED M. NoTT, HOWARD P. DENISON. 

